时域TEM喇叭天线的分析和设计  

Analysis and Design of Time-domain TEM Horn Antenna

作　　者：周蔚红[1] 刘培国[1] 何建国[1] 李高升[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《国防科技大学学报》2006年第4期59-62,共4页Journal of National University of Defense Technology

基　　金：国家863高技术资助项目(2001AA132020)

摘　　要：TEM喇叭是一种超宽带天线,但迄今为止大都是利用频域的概念来研究的。本节从波模理论出发,提出喇叭的开口阻抗不能看作真空波阻抗,它与喇叭尺寸、张角有关;由于冲激脉冲有时序性,反射只与局部结构有关。介绍了实际制作的TEM喇叭天线,并给出了实验结果,表明它具有良好的阻抗匹配特性和波形保真性,对时域天线的研究具有很好的理论和实用价值。TEM Hom is an ultra-wide-band antenna, which is usually employed in the analysis of frequency domain up to the present. A new concept is presented with wave mode theory. According to this concept, the impedance of antenna aperture cannot be regarded as the wave impedance in vacuum, but is connected with antenna size and flare angle. Because of the time sequence, the reflection is only connected with local structure. A TEM hom antenna is designed and fabricated. The experiment results show that its wave fidelity and impedance performance are excellent, so it is very valuable for the study of time-domain antenna.

关 键 词：时域天线 TEM喇叭 瞬态电磁场 

分 类 号：TN82[电子电信—信息与通信工程]